Tuesday, December 9, 2014

Current events for ALL Classes!You
will choose an article or science related video of over 2 pages or 45
minutes on science current event. It will fall into one (or more) of
these categories:

·Scientific discovery – for example, scientists find comets may have delivered the water found in earth’s oceans.

·Science-related event – for example, the Japan earthquake/tsunami/nuclear plant meltdown; the launch of a space probe.

·A cultural change/happening that involves science/technology – for example, bicyclists’ clothing that can act as a radar gun to show drivers how fast they’re moving.

·Science in public policy – for example, a bill or law that deals with science (cap on carbon emissions).

The
article must be timely, meaning it’s been published within the past
one/two months. Videos should not be older than 2 years. Finally, technology articles are okay, but I will not
accept any product announcements or reviews.

Create
a write-up of your current event, summarizing the story and answering
key questions. You will include a copy of the story you are citing or
the golden page format for the video, movie or program.

Science current events will:

Cite the news source, using the Oceana Golden page format for citations found on the Oceana website. Magazine Article:

Question:
Do I have the Alu
insert PV92 on my 16th
chromosome; determined through polymerase chain reaction and gel
electrophoresis?

•Hypothesis:. HINT,
‘kinda’
spelled out in the test!

•Test: We will isolate DNA from human cheek
cells. We will then amplify a segment of chromosome 16 using PCR. DNA samples
will be separated by different sized fragments using gel electrophoresis.
Finally, using proper staining methods to make the DNA visible using Ethidium
Bromide; we will be able to determine the genotype for the human Alu
insert PV92.It will be +,+ (yes, Alu); -,- (no alu), or + ,-(one alu).

•You will NOT need to include full materials lists, procedures or diagrams for this lab.

–Each
of these section headings should be included and
followed by “See
BABEC/Gene
Connection
hand outs.”

Convert the posted mass from oz → g
using the following formula 1oz. = 28.3 g

Take the mass measurement of the rubber
stopper on the metric balance.Each
group member should separately find the mass using the metric
balance.Zero scale between trials
and find the average for the object and enter into the data sheet.

Do this for four different rubber
stoppers with different posted masses (each table member should do all
parts of the experiment for at least one sinker)

Subtract the measured mass in grams
from the posted mass in grams to determine the relative error.You may disregard any negative numbers9
take an absolute value of your result).

Take the relative error in grams
and divide by the converted posted mass, in grams, and multiply by 100 to
determine the percent error.

Data:

Rubber
stopper #

Posted mass

Converted (g)

Average measured
mass

(g)

Relative
Error

% error

Observations:

Analysis:include your calculations and math work for doing the oz-g conversions,
relative and percent error.

Make a Bar
graph of actual versus converted mass values of the rubber stoppers used.

Conclusion: (restate
the hypothesis, explain how you answered the question or not and compare
numeric results to prove or refute your hypothesis, discuss observations as
possible errors and propose a next step and who outside of this science class
might care about your results)

You are to
look at the internal structure and function of a cell and create an illustrated
diagram, t-chart, web page, power point, story or other teacher approved
project format that compares the cell and its’ organelles to an analogous
system such as a school, a car, a factory or whatever; each of which have
important smaller parts with important functions.

Your project needs to include each organelle listed below and its role in the
cell and it will need an analogous system to the cell and each organelle. Make sure you compare and explain the roles of
each organelle and their analogous counterparts.

Ex: Cell =
School, where the nucleus, which controls all cell functions, could be compared
to the principal in the school.If you
use this example I will not give you higher than a 3 on #3 of the rubric.

Use the
text book, Internet, notes and your brains

Grading (subjective rubric = score of 5-0
points based on my feelings about the quality and evident effort on the project
and its’ parts)

Data table:Have
room to include ten trials, Yes, do the experiment ten times, make sure
everyone in your group has an opportunity to collect data by doing the
experiment.

Analysis: Show an example of
how calculated the volume of a drop, in mL. Also show an example of how
calculated the average volume of a drop, in mL, for the trials you did. Create
a data table and Bar graph showing the average drop # for all other groups in
the class.

Conclusion:Restate your hypothesis. Did you answer the
question?

How do your results compare
to the other tables?Explain.

How
might error have occurred in your experiment?What affect might it have had?How
can you redo your experiment to attain more accurate

results?

Bonus Points:if you finish both mini-labs early, you may
earn bonus points for conducting a next step to this experiment.You are limited to the materials provided or
on your person.You may also include a
graph(s) of your data for e.c.

Bonus Points: if you finish both
mini-labs early, you may earn bonus points for applying your data from this lab
to the drops on a penny lab to find the ave. volume of the bubble of water that
formed on the penny. Explain what you did and show the calculation.